title: Studies of liquid--gaseous two-phase systems by positron emitting radiotracers.
abstract: Positron emission tomography (PET) is an established tool for clinical diagnosis and research. An increasing number of non-medial applications are known. Based on this technique, feasibility tests were carried out on radiotracer applications in liquid-gaseous two-phase systems. A density measurement technique was successfully tested utilizing the density dependence of the positron range. In this case, a locally fixed 45Ti source was used. The spreading of a liquid tracer distribution in a bubbly flow was monitored, and the dispersion coefficient for the tracer in the liquid phase was determined. Here, 18F was used as the tracer.
authors.affiliation: Research Center Rossendorf Inc., Dresden, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Hensel
mesh_terms: D002627:Chemistry, Physical / Q000379:methods; D005462:Fluorine Radioisotopes; D011868:Radioisotopes; D011880:Radiotherapy Planning, Computer-Assisted; D014025:Titanium; D014055:Tomography, Emission-Computed / Q000379:methods*
chemical_list: D005462:Fluorine Radioisotopes; D011868:Radioisotopes; D014025:Titanium